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I own two bikes, a pretty cheap and cheerful close to stock 2006 GT Avalanche 3.0, and an all the bells and whistles custom built Cervelo Team Soloist road bike.

Recently I've started cycling with some colleagues on the weekends. As they're all pretty unfit, it'd be silly for me to use the Cervelo, so I take my MTB instead. Herein lies the problem. I've got slicks already for the MTB, I also swapped the stock pogo-stick Suntour fork for something slightly better. As it is, it's pretty much perfect for bashing the crap out of offroad, which was why I got it in the first place. However I'm spending a lot more time on the MTB on the road, and I've been spoiled by the shifting on my road bike and am starting to detest the default Alivio rears that don't always change as fast as I'd like and the occasional "jiggle the shifter" to get it into certain gears.

Before the cry goes up of, "Learn to adjust your derailleurs properly you whining pansy", I'll just note that I built my road bike from frame/component up, so it's definitely not that.

I'm not as savvy on my MTB stuff as I am on my road bike bling toys. I'm considering upgrading the drivetrain to either SRAM X5s, or Shimano Deore LX. My question is, will that level of groupset be enough to at least guarantee me proper indexed shifting without hiccups? Are there any advantages/disadvantages to either groupset?
 

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Dendrobius said:
My question is, will that level of groupset be enough to at least guarantee me proper indexed shifting without hiccups?
For road use, the Alevio should be able to do that if set up right. I have set these up to shift fine. Have you changed the cables and housing? Is your chain and cassette getting worn out? Are you sure you don't just need new shifters?
 

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"My question is, will that level of groupset be enough to at least guarantee me proper indexed shifting without hiccups? Are there any advantages/disadvantages to either groupset?"

Depends on what you are using as a group set on the road bike. But probably not. The SRAM X5 is approximately the equivalent of the Shimano Deore group. Not much of an upgrade from your current Alivio, and it would require SRAM shifters. SRAM rear derailleurs are not compatable with Shimano shifters. However, since your current set up is Alivio I'm sure you're running 8 speed. And that restricts your shifter choices. Unfortunately without a shifter up grade you won't even get close the the shifting performance of your road bike. Shifters make every bit as much difference in drive train performance as derailleurs. If you changed to an LX or XT rear derailleur you'd likely see an improvement. You'd also see an improvement with a SRAM X7 or X9 as long as you changed out the shifters to SRAM. If you intend to a full LX, XT, X7, or X9 group it will require an upgrade to a 9 speed cassette as well. And going full on XT or X9 and 9 speed will get you pretty close to your road group. But it still won't feel the same. No mountain group will.

Bottom line is, it just depends on how close you want it to be to your road group from a performance angle. An LX or XT derailleur upgrade will help, but only as much as your shifters will allow.

Good Dirt
 
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